*{
    margin: 0;
    padding: 0;
}
nav{
    background-color: #ffffff;
    width: 100%;
    height: 52px;
    position: relative;
}
h1{
    color: blue;
}
ul>li{
    float: left;
    list-style: none;
    position: absolute;
    left: 293px;
    line-height: 52px;
}
ul>li:nth-child(2){
    left: 403px;
}
ul>li:nth-child(3){
    left: 453px;
}
ul>li:nth-child(4){
    left: 513px;
}
nav>img:nth-child(4){
    position: absolute;
    left: 1500px;
}
nav>img:nth-child(3){
    position: absolute;
    left: 1400px;
    top: 2px;
}
nav>img:nth-child(2){
    position: absolute;
    left: 1300px;
}
section{
    background-color: #bdb7a1;
    width: 100%;
    height: 4680px;
    display: flex;
    overflow: hidden;
}
.left{
    margin-left: 293px;
    width: 692px;
    height: 915px;
    background-color: white;
    position: relative;
    top: 20px;
}
.left>p:nth-child(1){
    padding-top: 24px;
    margin-bottom: 24px;
}
.left>h2{
    padding-bottom: 24px;
}
.shang{
    width: 299px;
    height: 250px;
    background-color: orange;
    margin-top: 20px;
    margin-left: 10px;
}
.zhong{
    width: 299px;
    height: 200px;
    background-color: white;
    margin-top: 70px;
    margin-left: 10px;
}
.xia{
    width: 299px;
    height: 250px;
    background-color: orange;
    margin-top: 60px;
    margin-left: 10px;
}
article{
        background-color: white;
        position: absolute;  
}
 .left2{
    margin-left: 293px;
    width: 692px;
    height: 915px;
    background-color: white;
    position: absolute;
    top: -3700px;
} 
.left3{
    margin-left: 293px;
    width: 692px;
    height: 915px;
    background-color: white;
    position: absolute;
    top: -2760px;
}
.left4{
    margin-left: 293px;
    width: 692px;
    height: 915px;
    background-color: white;
    position: absolute;
    top: -1820px;
}
.left5{
    margin-left: 293px;
    width: 692px;
    height: 915px;
    background-color: white;
    position: absolute;
    top: -890px;

}